'Well trained' in the Bible

From the cities the descendants of Benjamin were counted on that day twenty-six thousand {sword-wielding men}, besides the inhabitants of Gibeah, who were counted seven hundred well-trained men.

From all these troops [were] seven hundred well-trained men {who were left-handed}; each one could sling with a stone at a hair and not miss.

Then ten thousand well-trained men from all Israel came out against Gibeah, and the battle became fierce; they did not know that disaster [was about to] {close in} on them.